Switch-actuating device



Oct. 16, 1923. 1,471,163

P. [EACH SWITCH ACTUATING DEVI CE Filed June 28, 1920 serenaded. 16, 1923;.

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PATENT .QFFIC PETER IBACEQ or KONIGSWINTER, GERMANY.

SWITGH-ACTUATING- DEVICE. 4

Application filed June 28, 192a Serial No. 392,466.

It isalready'known to open a blowgoff valve and to operate the starter of the motor byineans of a piston driven by the generated compressedair, as soon as a predetermined pressure has been reached in the pipe lead ins to the compressed air duct.

My invention more particularly refers to i a 'device'of the, kind aforesaid in which not only the starter for the motor, but also, the supply switch is .cut out automatically as soon as a predetermined air pressure has;

been reached in the air duct these switches being again switched on automatically after the pressure has fallen.

In the drawings afiixed to this specifica- I tion and forming part thereof a device em bodying my invention is illustrated by way of example in diagram.

Referring; to the drawing; 1 is the piston serving for throwing the current in and out. and 15 is the cylinder, in which this piston is'arranged to reciprocate and which is connected by pipes 16 and 17 with. the pressure reservoir 180i the compressor 19 20 is the electromotor driving the compressor. Inthe'pipes 16, 17-there is inserted another cylinder 21 and a weighted piston is arranged to reciprocate in this cylinder.

( n the pressure in the reservoir 18incr'easmg unduly the piston 22 will be raised and communication will be established between the pipes 16 and'].'?. On the other hand, as long as the pressure rema ns normal or when itdi'ops again, after having raised the piston this latter in its lowermost position will establish communication-of pipe 16 with the atmosphere by way of the conduit 23 provided in the piston. 2 is a rope having one end attached to piston 1, while its other end is fixed to a sheave 3. 4 is a sheave of I larger diameter coaxial with sheave 3, and

5 is another rope having one endfixed to sheave 4 while the otherend is connected to the weight 12. 11 is the contact brush of the starting switch 18, said brush being fastened'to said rope. 13'is the supply switch whose lever is resting on the fork 7' of a loose'sheave 6 carried by the rope 5 and hav- I mg the weight 8 suspended therefrom, said weight being heavier than weight 12. 10 and 12 are guide sheaves for rope",5.

The double sheave 3; 4: merely serves for iny creasingthe distance travelledby rope 5.

The operation of this device is the -follow-' ing; Assoon as compressed air is introduced into cylinder 15 by raid oft pipe '16, the piston l is lowered and by exerting a pull on rope 2 1 causes rope 5 tobe shortened and the lighter weight 12-to be lifted, the heavier weight 8 still resting on its basis 16. eThe contact l}1IiSl1 '-ll is carried pastth'e contactsof the starting switch 18 and throws the motor out. Only after the' brush has reached itsend position the heavier weight 8 is lifted'and the. supply switch 13 is thereby quickly opened. Owing; to the tackle-action ofthe sheaves only one half of the weight 8 becomes effective. 7 I e Whenever the piston 1- rises, theheavy weight 8 first closesithe switch 13. Only aftersaidweight isirestingagain on its basis,"the lighter weight 12 will carry the brush 1]. past the contacts18,thus,throwing the motor in again.

, r I wish it to be understoodthatl do not desire tobe limited to the exact details of constructionshown and described for obvious modifications will occur to the person skilled in .the art; I

I claim:

In a device of eo Ithe'kind described in combination, a pressure pump and an electro- I motor for operating saidpump; .a piston adapted to be displaced by an excess pressure generated by said pump a rope conneetedat one end to saidcpiston, a weight act ng on the other end of said rope, alarger weightiacting on said rope intermediate its ends, a'motor starter operatively connected to said rope intermediate said weights and a supply switch adapted to be influenced by said larger weight. I V p In testimony whereof I afiix mysignaturef PETER IBACH. 

